i have download from here.. http://tdb.rpc1.org/ toNEC ND-5100A 5100A to 5500A, Allows burning of -R media. Supplied as a binary. This is the 5500A 1.51 firmware patched to work on a 5100A, and includes RPC1 patch. 5100 @ 5500 1.51 Original Stock Firmware Binary ND-5100A 10AC...